This is by far the hardest thing I've had to do!!

Chelsea • TTC over 3 years with 3 misscarraiges. Currently undergoing fertility treatments.
So we've been trying to conceive our first baby for 3 1/2 years now with 3 know misscarraiges, 2 last year and 1 this year. Husband and I have been through all sorts of testing and everything with us is normal. The only thing the fertility specialist thinks is my progesterone isn't increasing and that's why I've miscarried. I literally have unexplained infertility! We have done 8 months of Clomid, took a break for a year and then May of this year we started femara, trigger shot, and then using progesterone suppositories 4 days after trigger while doing timed intercourse. Well today I found out yet again 3rd month doing this, I'm not pregnant again!! I can't take the "oh it will happen when it's time", and "you just need to relax and have fun" from people!! I just want a baby already I'm so frustrated and heartbroken I don't understand any of this!! We decided that <a href="">IUI</a> will be the next step for us, but if all these meds and timed intercourse hasn't worked then why would <a href="">IUI</a>? I'm just wondering if any of you been through this or are going through this now? I would just like some advice or insight on all this please. Sorry for the venting and thank you in advance!!